Electric control box and air conditioner

Abstract

The invention discloses an electric control box and an air conditioner, and relates to the technical field of air conditioners. The electric control box comprises a shell, an electric control board, a fan and radiating fins. The cooling fins are connected outside the shell, the fan and the electric control board are both installed in the shell, the position of the fan corresponds to the position of the electric control board, and the fan is used for driving air to blow through the electric control board. Compared with the prior art, the electric control box provided by the invention adopts the heat dissipation fins connected outside the shell and the fan mounted in the shell, so that the electric control box can be quickly cooled, the heat dissipation efficiency is high, the heat dissipation effect is good, the operation stability of the electric control box is ensured, and the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an electric control box and an air conditioner. Background Art

[0002] At present, with the continuous advancement of science, people's requirements for environmental protection are getting higher and higher. In this regard, heat pump air conditioners have gradually come into people's view. They use solar energy resources stored in the surface soil, air and water as cold and heat sources, without combustion, smoke exhaust, waste, pollution, and green environmental protection. In heat pump air conditioners, in order to improve safety, the electric control box is generally fully sealed to prevent flammable gas from entering the electric control box and causing combustion or explosion when encountering electricity, and to prevent water from entering the electric control box and causing a short circuit of the electric control board. However, in this way, the heat dissipation effect of the electric control box becomes worse, and the heat inside cannot be quickly dissipated to the outside world, causing the temperature to remain at a high level, which directly affects the stability of the operation of the electric control box and the user experience is poor. Summary of the invention

[0003] The problem solved by the present invention is how to achieve rapid heat dissipation and cooling of the electric control box, with high heat dissipation efficiency and good heat dissipation effect, ensure the stability of the operation of the electric control box, and improve the user experience.

[0004] To solve the above problems, the technical solution of the present invention is achieved as follows:

[0005] In a first aspect, the present invention provides an electric control box, comprising a housing, an electric control board, a fan and a heat dissipation fin, wherein the heat dissipation fin is connected to the outside of the housing, the fan and the electric control board are both installed in the housing, the position of the fan corresponds to the position of the electric control board, and the fan is used to drive air to blow through the electric control board. Compared with the prior art, the electric control box provided by the present invention can achieve rapid heat dissipation and cooling of the electric control box, with high heat dissipation efficiency and good heat dissipation effect, thereby ensuring the stability of the operation of the electric control box and improving the user experience.

[0006] Furthermore, the electric control box also includes a semiconductor cooling sheet, which is mounted on the housing, and the semiconductor cooling sheet is relatively provided with a hot end and a cold end, the cold end is arranged in the housing, and the hot end is connected to the heat dissipation fin. The cold energy generated by the semiconductor cooling sheet is transferred to the housing through the cold end to reduce the temperature of the air in the housing, thereby reducing the temperature of the electric control board and ensuring the stable operation of the electric control board. The heat generated by the semiconductor cooling sheet is transferred to the heat dissipation fin through the hot end, and is dissipated to the outside under the action of the heat dissipation fin.

[0007] Furthermore, the inner wall of the housing is provided with a mounting groove, the semiconductor cooling sheet is installed in the mounting groove, the hot end is arranged on the side of the cold end close to the bottom wall of the mounting groove, and the heat dissipation fin is arranged through the bottom wall of the mounting groove and is arranged in close contact with the hot end, so as to improve the heat conduction efficiency between the hot end and the heat dissipation fin, so that the heat of the hot end can be quickly transferred to the heat dissipation fin and dissipated to the outside air through the heat dissipation fin.

[0008] Furthermore, the heat dissipation fins and the housing are integrally formed to improve the connection strength between the heat dissipation fins and the housing, and further enhance the sealing of the electric control box and improve safety.

[0009] Furthermore, a clearance hole is provided on the bottom wall of the installation slot, the clearance hole is connected to the installation slot, the heat dissipation fin is matched with the clearance hole, and a sealant is provided in the matching gap between the heat dissipation fin and the clearance hole. The clearance hole is used to limit and fix the heat dissipation fin, and the sealant is used to seal the matching gap between the heat dissipation fin and the clearance hole to ensure the sealing of the entire electric control box, prevent flammable gas from entering the electric control box and causing combustion or explosion when encountering electricity, and avoid water from entering the electric control box and causing a short circuit of the electric control board, thereby improving safety.

[0010] Furthermore, a heat conductive adhesive is provided between the heat sink fin and the hot end. The heat conductive adhesive is used to improve the heat exchange performance and reduce heat loss, so as to further improve the heat conduction efficiency between the hot end and the heat sink fin, so that the heat of the hot end can be quickly transferred to the heat sink fin, improve the heat dissipation efficiency, and enhance the heat dissipation effect.

[0011] Furthermore, the electric control box also includes a temperature sensor and a controller, both of which are installed in the housing, the temperature sensor is connected to the controller, the controller is connected to the fan and the semiconductor cooling sheet at the same time, the temperature sensor is used to detect the real-time temperature in the housing, the controller is used to control the fan to start when the real-time temperature is greater than or equal to the first preset temperature and less than the second preset temperature, the controller is also used to control the semiconductor cooling sheet to start when the real-time temperature is greater than or equal to the second preset temperature and less than the third preset temperature, and the controller is also used to control the fan and the semiconductor cooling sheet to start at the same time when the real-time temperature is greater than or equal to the third preset temperature. Different ways of cooling and dissipating the heat of the electric control box are used in different temperature ranges, which can reduce energy consumption as much as possible while ensuring the cooling effect, thereby achieving energy-saving and environmental protection effects.

[0012] Furthermore, there are multiple fans, which are arranged side by side; and / or there are multiple heat sinks, which are arranged in parallel and spaced apart. Multiple fans work together to increase the flow speed of air in the housing, thereby improving the air-cooling and heat dissipation effect on the electric control board and increasing the fault tolerance rate. Multiple heat sinks work together to further increase the contact area between the heat sink and the outside air, thereby improving the heat dissipation efficiency.

[0013] Furthermore, the housing includes a box body and a box cover, the box cover is arranged on the box body and is sealed with the box body, the electric control board and the fan are arranged in the box body, and the heat dissipation fins are arranged on a side of the box body away from the box cover. The heat dissipation fins are used to conduct heat from the box body and dissipate it into the outside air.

[0014] In a second aspect, the present invention provides an air conditioner, comprising a casing, a motor bracket, a fan and the above-mentioned electric control box, wherein the electric control box comprises a casing, an electric control board, a fan and a heat dissipation fin, the heat dissipation fin is connected to the outside of the casing, the fan and the electric control board are both installed in the casing, the position of the fan corresponds to the position of the electric control board, the fan is used to drive air to blow through the electric control board, the motor bracket is connected to the casing, the fan and the casing are both installed on the motor bracket, and the fan is used to perform air cooling and heat dissipation on the heat dissipation fin. The air conditioner can achieve rapid heat dissipation and cooling of the electric control box, has high heat dissipation efficiency, good heat dissipation effect, ensures the stability of the operation of the electric control box, and improves user experience.

[0015] Furthermore, the air conditioner also includes a middle partition and a compressor, both of which are installed in the casing, the compressor and the fan are arranged on both sides of the middle partition relatively, the casing is connected to the middle partition, an avoidance space is formed between the middle partition and the motor bracket, and the heat dissipation fins are arranged through the avoidance space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of an electric control box according to a first embodiment of the present invention;

[0017] Figure 2 It is a schematic diagram of the structure of the connection between the housing, the fan and the electric control board in the electric control box according to the first embodiment of the present invention;

[0018] Figure 3 It is a structural block diagram of the connection between the controller, the fan and the semiconductor cooling sheet in the electric control box according to the first embodiment of the present invention;

[0019] Figure 4 It is a cross-sectional view of the connection between the semiconductor cooling sheet and the heat dissipation fin in the electric control box according to the first embodiment of the present invention;

[0020] Figure 5 It is a structural schematic diagram of a box body of a housing in an electric control box according to a first embodiment of the present invention;

[0021] Figure 6 is a schematic structural diagram of an outdoor unit of an air conditioner according to a second embodiment of the present invention;

[0022] Figure 7 yes Figure 6 Schematic diagram of the structure in which the middle motor bracket and the middle partition are spaced apart.

[0023] Description of reference numerals:

[0024] 10-outdoor unit; 100-electric control box; 110-housing; 111-installation slot; 112-clearance hole; 113-box body; 114-box cover; 120-electric control board; 130-fan; 140-heat sink fin; 150-semiconductor cooling sheet; 151-hot end; 152-cold end; 160-temperature sensor; 170-controller; 200-housing; 300-motor bracket; 400-fan; 500-middle partition; 600-compressor; 700-avoidance space. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] First embodiment

[0027] Please refer to Figures 1 to 3 The embodiment of the present invention provides an electric control box 100 for controlling the operation of electrical components in an air conditioner. The electric control box 100 can achieve rapid heat dissipation and cooling, high heat dissipation efficiency, good heat dissipation effect, ensure the stability of the operation of the electric control box 100, and improve the user experience.

[0028] In this embodiment, the electric control box 100 is applied to a heat pump air conditioner, and the electric control box 100 is installed in the heat pump air conditioner, and is used to control the circuit of the electrical components so that the electrical components cooperate with each other to achieve the temperature adjustment function. However, it is not limited to this. In other embodiments, the electric control box 100 can be applied to a compression air conditioner or an absorption air conditioner, and the application scenario of the electric control box 100 is not specifically limited.

[0029] The electric control box 100 includes a housing 110, an electric control board 120, a fan 130, a heat sink 140, a semiconductor cooling sheet 150, a temperature sensor 160 and a controller 170. The heat sink 140 is connected to the outside of the housing 110, and the heat sink 140 is used to increase the contact area with the outside air to improve the heat dissipation efficiency and enhance the heat dissipation effect. The fan 130 and the electric control board 120 are both installed in the housing 110, and the position of the fan 130 corresponds to the position of the electric control board 120. The fan 130 is used to drive air to blow through the electric control board 120 to achieve air cooling and heat dissipation of the electric control board 120, and can make the air flow in the housing 110, blow the local hot flow gas to other positions, and prevent the hot flow gas from being in the same position all the time, causing the temperature of the part of the electric control board 120 located at this position to be too high. Specifically, the electric control board 120 generates heat during operation, wherein a portion of the heat is dissipated into the air in the outer shell 110, and the other portion is transferred to the outer shell 110; in this regard, the fan 130 can drive the air flow in the outer shell 110 to prevent local overheating, and the heat dissipation fins 140 can export the heat on the outer shell 110 and dissipate it into the outside air; the fan 130 and the heat dissipation fins 140 work together to achieve rapid heat dissipation and cooling of the electric control box 100, with high heat dissipation efficiency and good heat dissipation effect, thereby ensuring the stability of the operation of the electric control board 120 in the electric control box 100 and improving the user experience.

[0030] Please refer to Figure 4 It should be noted that the semiconductor refrigeration sheet 150 is installed on the housing 110, and the housing 110 can limit and fix the semiconductor refrigeration sheet 150 to prevent the semiconductor refrigeration sheet 150 from being displaced relative to the housing 110. In this embodiment, the position of the semiconductor refrigeration sheet 150 corresponds to the position of the electric control board 120, and the semiconductor refrigeration sheet 150 is arranged in parallel and spaced apart from the electric control board 120. Specifically, the semiconductor refrigeration sheet 150 is relatively provided with a hot end 151 and a cold end 152, the cold end 152 is arranged in the housing 110, and the hot end 151 is connected to the heat dissipation fin 140. The cold energy generated by the semiconductor refrigeration sheet 150 is transferred to the housing 110 through the cold end 152 to reduce the temperature of the air in the housing 110, thereby reducing the temperature of the electric control board 120, and ensuring the stable operation of the electric control board 120. The heat generated by the semiconductor refrigeration sheet 150 is transferred to the heat dissipation fin 140 through the hot end 151, and is dissipated to the outside under the action of the heat dissipation fin 140.

[0031] Furthermore, when the cold end 152 of the semiconductor cooling sheet 150 transfers the cold energy to the air in the housing 110, the fan 130 can drive the air in the housing 110 to flow, so as to prevent the occurrence of local overcooling, and the cold air merges and blends with the hot air generated by the electric control board 120 during the flow process, so as to reduce the average temperature of the air in the housing 110, thereby reducing the temperature of the electric control board 120 and ensuring the stable operation of the electric control board 120. In this way, the semiconductor cooling sheet 150 and the fan 130 work together to further improve the heat dissipation efficiency and enhance the heat dissipation effect.

[0032] In this embodiment, the cold end 152 of the semiconductor refrigeration sheet 150 is spaced apart from the electric control board 120, and the cold end 152 of the semiconductor refrigeration sheet 150 is used to transfer cold energy to the air in the housing 110, so as to reduce the average temperature of the air in the housing 110, thereby reducing the temperature of the electric control board 120. However, this is not limited to this. In other embodiments, the cold end 152 of the semiconductor refrigeration sheet 150 can also be arranged in close contact with the electric control board 120. In this case, the cold end 152 of the semiconductor refrigeration sheet 150 directly transfers cold energy to the electric control board 120, which can also play a role in heat dissipation and cooling of the electric control board 120.

[0033] It is worth noting that the temperature sensor 160 and the controller 170 are both installed in the housing 110, the temperature sensor 160 is connected to the controller 170, and the controller 170 is connected to the fan 130 and the semiconductor cooling sheet 150 at the same time. The temperature sensor 160 is used to detect the real-time temperature in the housing 110, and send the real-time temperature data to the controller 170 in the form of an electrical signal. The controller 170 is used to control the fan 130 to start when the real-time temperature is greater than or equal to the first preset temperature and less than the second preset temperature. The controller 170 is also used to control the semiconductor cooling sheet 150 to start when the real-time temperature is greater than or equal to the second preset temperature and less than the third preset temperature. The controller 170 is also used to control the fan 130 and the semiconductor cooling sheet 150 to start at the same time when the real-time temperature is greater than or equal to the third preset temperature. In this way, the electric control box 100 is cooled and dissipated in different temperature ranges in different ways, which can reduce energy consumption as much as possible while ensuring the cooling effect, thereby achieving the effect of energy saving and environmental protection.

[0034] Specifically, the first preset temperature is lower than the second preset temperature, the second preset temperature is lower than the third preset temperature, and the first preset temperature, the second preset temperature and the third preset temperature can all be adjusted according to actual conditions.

[0035] When the real-time temperature is lower than the first preset temperature, it indicates that the heating of the electric control board 120 is very slight, and the real-time temperature inside the housing 110 has not reached the level requiring intervention for cooling (using the fan 130 or the semiconductor cooling chip 150 for heat dissipation and cooling). At this time, the fan 130 and the semiconductor cooling chip 150 are temporarily not running, and the heat dissipation fins 140 are used to dissipate the heat of the housing 110 into the outside air.

[0036] When the real-time temperature is greater than or equal to the first preset temperature and less than the second preset temperature, it indicates that the heating of the electric control board 120 is relatively slight, and the real-time temperature inside the housing 110 has initially reached a level requiring intervention for cooling. At this time, the controller 170 only controls the fan 130 to start, and the semiconductor refrigeration plate 150 is temporarily not running. The fan 130 is used to drive the air flow inside the housing 110, and cooperates with the heat dissipation effect of the heat dissipation fins 140 to achieve rapid cooling of the electric control box 100, thereby ensuring the stability of the operation of the electric control board 120.

[0037] When the real-time temperature is greater than or equal to the second preset temperature and less than the third preset temperature, it indicates that the heating of the electric control board 120 is more serious and the real-time temperature in the housing 110 has reached a level requiring cooling intervention. At this time, the controller 170 only controls the semiconductor refrigeration chip 150 to start, and the fan 130 does not run temporarily. The semiconductor refrigeration chip 150 dissipates the cold air into the air in the housing 110, and cooperates with the heat dissipation effect of the heat sink 140 to achieve rapid cooling of the electric control box 100, thereby ensuring the stability of the operation of the electric control board 120.

[0038] When the real-time temperature is greater than or equal to the third preset temperature, it means that the heating of the electric control board 120 is very serious, and the real-time temperature in the shell 110 has reached a level that urgently requires cooling intervention. At this time, the controller 170 controls the fan 130 and the semiconductor refrigeration plate 150 to start at the same time. The semiconductor refrigeration plate 150 dissipates cold air into the air in the shell 110, and the fan 130 drives the cold and hot air to blend quickly, and cooperates with the heat dissipation effect of the heat sink 140 to achieve rapid cooling of the electric control box 100, thereby ensuring the stability of the operation of the electric control board 120.

[0039] Furthermore, the inner wall of the housing 110 is provided with a mounting groove 111, and the semiconductor cooling sheet 150 is installed in the mounting groove 111, and the mounting groove 111 is used to accommodate and limit the semiconductor cooling sheet 150. The hot end 151 is arranged on the side of the cold end 152 close to the bottom wall of the mounting groove 111, that is, the cold end 152 is arranged close to the electric control board 120, and the hot end 151 is arranged close to the bottom wall of the mounting groove 111. Specifically, the hot end 151 is arranged to fit the bottom wall of the mounting groove 111, and the heat dissipation fins 140 are arranged to pass through the bottom wall of the mounting groove 111 and fit the hot end 151 to improve the heat conduction efficiency between the hot end 151 and the heat dissipation fins 140, so that the heat of the hot end 151 can be quickly transferred to the heat dissipation fins 140, and dissipated to the outside air through the heat dissipation fins 140.

[0040] In this embodiment, a clearance hole 112 is provided on the bottom wall of the mounting groove 111, and the clearance hole 112 is connected with the mounting groove 111. The heat dissipation fin 140 extends into the mounting groove 111 through the clearance hole 112 and is arranged in close contact with the hot end 151. Specifically, the heat dissipation fin 140 is matched with the clearance hole 112, and a sealant (not shown) is arranged in the matching gap between the heat dissipation fin 140 and the clearance hole 112. The clearance hole 112 is used to limit and fix the heat dissipation fin 140, and the sealant is used to seal the matching gap between the heat dissipation fin 140 and the clearance hole 112 to ensure the sealing of the entire electric control box 100, prevent the combustible gas from entering the electric control box 100 and causing combustion or explosion when encountering electricity, and prevent water from entering the electric control box 100 and causing the electric control board 120 to short-circuit, thereby improving safety. However, this is not limited to this. In other embodiments, the heat dissipation fins 140 may also be integrally formed with the housing 110 to increase the connection strength between the heat dissipation fins 140 and the housing 110, and further enhance the sealing of the electric control box 100 to improve safety.

[0041] In this embodiment, a thermal conductive adhesive (not shown) is provided between the heat sink fins 140 and the hot end 151. The thermal conductive adhesive is used to improve the heat exchange performance and reduce heat loss, so as to further improve the heat conduction efficiency between the hot end 151 and the heat sink fins 140, so that the heat of the hot end 151 can be quickly transferred to the heat sink fins 140, thereby improving the heat dissipation efficiency and enhancing the heat dissipation effect.

[0042] It is worth noting that there are multiple fans 130, which are arranged side by side. The multiple fans 130 work together to increase the flow speed of the air in the housing 110, thereby improving the air cooling and heat dissipation effect on the electric control board 120, and can increase the fault tolerance rate. When a part of the fans 130 fails, no maintenance is required (the other part of the fans 130 are used to dissipate heat for the electric control board 120), reducing the number of maintenance times and extending the service life. In this embodiment, the number of fans 130 is two, but it is not limited to this. In other embodiments, the number of fans 130 can be three or four, and the number of fans 130 is not specifically limited.

[0043] Furthermore, the number of heat dissipating fins 140 and the clearance holes 112 are both multiple, and the multiple heat dissipating fins 140 are arranged in parallel and spaced apart. Each heat dissipating fin 140 cooperates with a clearance hole 112, and the multiple heat dissipating fins 140 work together to further increase the contact area between the heat dissipating fins 140 and the external air, thereby improving the heat dissipation efficiency.

[0044] In this embodiment, there are multiple fans 130 and multiple heat sink fins 140. However, this is not limited to this. In other embodiments, the number of fans 130 may be limited to multiple and the number of heat sink fins 140 may be limited to one; or the number of heat sink fins 140 may be limited to multiple and the number of fans 130 may be limited to one.

[0045] Please refer to Figure 1 and Figure 5 The housing 110 includes a box body 113 and a box cover 114. The box cover 114 is placed on the box body 113 and is sealed with the box body 113 to ensure the sealing between the box cover 114 and the box body 113, to prevent the combustible gas from entering the electric control box 100 and causing combustion or explosion when encountering electricity, and to prevent water from entering the electric control box 100 and causing a short circuit of the electric control board 120, thereby improving safety. Specifically, the electric control board 120 and the fan 130 are both arranged in the box body 113, and the heat dissipation fins 140 are arranged on the side of the box body 113 away from the box cover 114. The heat dissipation fins 140 are used to extract the heat of the box body 113 and dissipate it into the outside air.

[0046] In the electric control box 100 described in the embodiment of the present invention, the heat dissipation fins 140 are connected to the outside of the housing 110, the fan 130 and the electric control board 120 are both installed in the housing 110, the position of the fan 130 corresponds to the position of the electric control board 120, and the fan 130 is used to drive air to blow through the electric control board 120. Compared with the prior art, the electric control box 100 provided by the present invention adopts the heat dissipation fins 140 connected to the outside of the housing 110 and the fan 130 installed in the housing 110, so that the electric control box 100 can achieve rapid heat dissipation and cooling of the electric control box 100, with high heat dissipation efficiency and good heat dissipation effect, thereby ensuring the stability of the operation of the electric control box 100 and improving the user experience.

[0047] Second embodiment

[0048] Please refer to Figure 6 and Figure 7 The present invention provides an air conditioner (not shown) for controlling indoor temperature. The air conditioner includes an indoor unit (not shown) and an outdoor unit 10, and the outdoor unit 10 includes a housing 200, a motor bracket 300, a fan 400, an electric control box 100, a middle partition 500 and a compressor 600. The basic structure and principle of the electric control box 100 and the technical effects produced are the same as those of the first embodiment. For the sake of brief description, for the parts not mentioned in this embodiment, reference can be made to the corresponding contents in the first embodiment.

[0049] In this embodiment, the air conditioner is a heat pump air conditioner, and the indoor unit is connected to the outdoor unit 10. The indoor unit is used to blow hot air or cold air into the room to achieve the function of heating or cooling, thereby achieving the effect of regulating the indoor temperature. The outdoor unit 10 is used to compress and exchange heat sources to ensure the stability of regulating the indoor temperature.

[0050] Specifically, in the outdoor unit 10, the motor bracket 300 is connected to the housing 200, and the housing 200 is used to support and fix the motor bracket 300. The fan 400 and the housing 110 of the electric control box 100 are both installed on the motor bracket 300, and the motor bracket 300 is used to fix the positions of the fan 400 and the electric control box 100. The fan 400 is used to exchange heat with the heat source, and the fan 400 is also used to perform air cooling and heat dissipation on the heat dissipation fins 140 to speed up the air flow rate around the heat dissipation fins 140, further improve the heat dissipation efficiency of the electric control box 100, and enhance the heat dissipation effect of the electric control box 100.

[0051] In this embodiment, the middle partition 500 and the compressor 600 are both installed in the housing 200, and the compressor 600 and the fan 400 are relatively arranged on both sides of the middle partition 500. The middle partition 500 is used to separate the compressor 600 and the fan 400 to ensure the stability of the operation of the compressor 600 and the fan 400. The housing 110 of the electric control box 100 is connected to the middle partition 500, and the middle partition 500 and the motor bracket 300 work together to further fix the position of the electric control box 100 to prevent the electric control box 100 from being displaced due to vibration during the operation of the air conditioner. Specifically, the middle partition 500 is spaced apart from the motor bracket 300, and an escape space 700 is formed between the middle partition 500 and the motor bracket 300. The heat dissipation fins 140 are arranged through the escape space 700 and extend in a direction close to the fan 400 to ensure that the airflow generated by the fan 400 can blow through the heat dissipation fins 140, thereby accelerating the air flow rate around the heat dissipation fins 140 and improving the heat dissipation effect.

[0052] The beneficial effects of the air conditioner described in the embodiment of the present invention are the same as those of the first embodiment, and will not be described in detail herein.

[0053] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. An electric control box, characterized in that: The invention comprises a housing (110), an electric control board (120), a fan (130) and a heat dissipation fin (140), wherein the heat dissipation fin (140) is connected to the outside of the housing (110), the fan (130) and the electric control board (120) are both installed in the housing (110), the position of the fan (130) corresponds to the position of the electric control board (120), and the fan (130) is used to drive air to blow through the electric control board (120).

2. The electric control box according to claim 1, characterized in that: The electric control box further comprises a semiconductor refrigeration sheet (150), the semiconductor refrigeration sheet (150) being mounted on the housing (110), the semiconductor refrigeration sheet (150) being provided with a hot end (151) and a cold end (152) opposite to each other, the cold end (152) being arranged in the housing (110), and the hot end (151) being connected to the heat dissipation fin (140).

3. The electric control box according to claim 2, characterized in that: The inner wall of the shell (110) is provided with a mounting groove (111), the semiconductor cooling plate (150) is installed in the mounting groove (111), the hot end (151) is arranged on the side of the cold end (152) close to the bottom wall of the mounting groove (111), and the heat dissipation fin (140) is arranged through the bottom wall of the mounting groove (111) and is arranged in close contact with the hot end (151).

4. The electric control box according to claim 3, characterized in that: The heat dissipation fins (140) and the housing (110) are integrally formed.

5. The electric control box according to claim 3, characterized in that: The bottom wall of the installation groove (111) is provided with a clearance hole (112), the clearance hole (112) is communicated with the installation groove (111), the heat dissipation fin (140) is matched with the clearance hole (112), and a sealant is provided in the matching gap between the heat dissipation fin (140) and the clearance hole (112).

6. The electric control box according to claim 3, characterized in that: Thermal conductive glue is provided between the heat dissipation fins (140) and the hot end (151).

7. The electric control box according to claim 2, characterized in that: The electric control box also includes a temperature sensor (160) and a controller (170). Both the temperature sensor (160) and the controller (170) are installed in the housing (110). The temperature sensor (160) is connected to the controller (170). The controller (170) is simultaneously connected to the fan (130) and the semiconductor cooling plate (150). The temperature sensor (160) is used to detect the real-time temperature in the housing (110). The controller (170) is used to control the fan (130) to start when the real-time temperature is greater than or equal to a first preset temperature and less than a second preset temperature. The controller (170) is also used to control the semiconductor cooling plate (150) to start when the real-time temperature is greater than or equal to the second preset temperature and less than a third preset temperature. The controller (170) is also used to control the fan (130) and the semiconductor cooling plate (150) to start simultaneously when the real-time temperature is greater than or equal to the third preset temperature.

8. The electric control box according to claim 1, characterized in that: There are multiple fans (130), and the multiple fans (130) are arranged side by side; and / or there are multiple heat dissipation fins (140), and the multiple heat dissipation fins (140) are arranged in parallel and at intervals.

9. The electric control box according to claim 1, characterized in that: The housing (110) comprises a box body (113) and a box cover (114); the box cover (114) is disposed on the box body (113) and is sealed to the box body (113); the electric control board (120) and the fan (130) are both disposed in the box body (113); and the heat dissipation fins (140) are disposed on a side of the box body (113) away from the box cover (114).

10. An air conditioner, characterized in that: The invention comprises a casing (200), a motor bracket (300), a fan (400) and an electric control box as described in any one of claims 1 to 9, wherein the motor bracket (300) is connected to the casing (200), the fan (400) and the casing (110) are both installed on the motor bracket (300), and the fan (400) is used for air cooling and heat dissipation of the heat dissipation fins (140).

11. The air conditioner according to claim 10, characterized in that: The air conditioner further comprises a middle partition (500) and a compressor (600), wherein the middle partition (500) and the compressor (600) are both installed in the casing (200), the compressor (600) and the fan (400) are arranged on two sides of the middle partition (500) opposite to each other, the casing (110) is connected to the middle partition (500), an escape space (700) is formed between the middle partition (500) and the motor bracket (300), and the heat dissipation fins (140) are arranged through the escape space (700).

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